I moved linuxiuvat and all the games to another server. The new IPv4 address is 188.8.131.52 and IPv6 is 2a03:4000:2b:39b::1.
The new server should provide roughly the same performance but it is also a bit cheaper. The statistics show that there are still some players on the servers but we are far away from the peak in 2014/2015 when Minetest, OpenArena and Sauerbraten were the most visited games on linuxiuvat.de. It is not much of a surprise though because there is nobody who keeps those servers full all day long and you need at least a few regular players to achieve that. Sorry, the author of this text is not available for this task at the moment. :)
The good news is linuxiuvat.de will be online for the foreseeable future and there is no reason to worry.